function Pager(tableName, itemsPerPage) {
    this.tableName = tableName;
    this.itemsPerPage = itemsPerPage;
    this.currentPage = 1;
    this.pages = 0;
    this.inited = false;
    border_hover_color		: '#ccc';
	text_hover_color  		: '#000';
	background_hover_color	: '#fff';
   
    this.showRecords = function(from, to) {      
        var rows = document.getElementById(tableName).rows;
        if(rows == 0){
        	return;
        }
        // i starts from 1 to skip table header row
        for (var i = 1; i < rows.length; i++) {
            if (i < from || i > to)
                rows[i].style.display = 'none';
            else
                rows[i].style.display = '';
        }
    };
   
    this.showPage = function(pageNumber) {
          if (! this.inited) {
                   alert("not inited");
                   return;
          }
 
        var oldPageAnchor = document.getElementById('pg'+this.currentPage);
        if(oldPageAnchor!=null){oldPageAnchor.className = 'pg-normal';}
       
        this.currentPage = pageNumber;
        var newPageAnchor = document.getElementById('pg'+this.currentPage);
        if(newPageAnchor!=null){newPageAnchor.className = 'pg-selected';}
       
        var from = (pageNumber - 1) * itemsPerPage + 1;
        var to = from + itemsPerPage - 1;
        this.showRecords(from, to);
    }  ;
   
    this.prev = function() {
        if (this.currentPage > 1)
            this.showPage(this.currentPage - 1);
    }
   ;
    this.next = function() {
        if (this.currentPage < this.pages) {
            this.showPage(this.currentPage + 1);
        }
    }                      
   ;
    this.init = function() {
        var rows = document.getElementById(tableName).rows;
        var records = (rows.length - 1);
        this.pages = Math.ceil(records / itemsPerPage);
        this.inited = true;
    }
 ;
    this.showPageNav = function(pagerName, positionId) {
          if (! this.inited) {
                   alert("not inited");
                   return;
          }
          var element = document.getElementById(positionId);
         
          var pagerHtml = '<span onclick="' + pagerName + '.prev();" class="pg-normal"> &#171 Prev </span> | ';
          for (var page = 1; page <= this.pages; page++)
            pagerHtml += '<span id="pg' + page + '" class = "pg-normal" onclick="' + pagerName + '.showPage(' + page + ');">' + page + '</span> | ';
          pagerHtml += '<span onclick="'+pagerName+'.next();" class="pg-normal"> Next &#187;</span>';          
       
        if(element!=null){element.innerHTML = pagerHtml;}
    };
}